Torah Calendar.com:http://www.torahcalendar.com
(Please note: Torah Calendar currently still hold to a Friday-Saturday Sabbath but their site has the correct dates for new moon sightings and other astronomical sightings. In addition they determine when the extra thirteenth month of Aviv 2 was added by the ‘rule of equinoxes’ rather than the ripening of the barley, so that day 15 of month 1 always falls on, or after, the day of the spring equinox and in the absence of any historical records this is the best approximation of when the barley would have been ripe in any given year).